Process for manufacturing artillery-bushes.



c. BESOZZIQ PROCESS FOR MANUFACTURING ARTILLERY BUSHES.

APPucATmn man AUG. 11, 1915.

1,20,803. Q Patented Oct. 10, 1916.

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C. BESOZZI.

PROCESS FOR MANUFACTURING ARTILLERY BUS'HES.

APPLICATION FILED AUG. 11. 1915.

1,200,803. Patented Oct. 10,1916.

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. vented certain new and useful Improvementsin Processes for Manufacturing Artillery-' CELESTE BESOZZI,

or MILAN, ITALY.

PROCESS FOR MANUFACTURING ARTILLERY-BUSHES.

To all whom it may concern Be 'it 'known that I, CELESTE BESOZZI, manufacturer, subject of the Kingdom of Italy, residing at 24 Corso P. Nuova, Milan,

in the region of Lombarvia, Italy, have in- Bushes, of which the following is a specificat-ion.

This invention relates to the manufacture of artillery bushes and has for its object to provide a new bush or case of fixed gage for explosives that shall be resistant to pressure, water proof and free from any dangerous action on the explosive contained therein.

The invention consists in first preparing a board from'hemp fiber and an absorbent material-such as talc or the like, cutting same into oblong rectangular blanks with the fibers arranged in the direction of the longer sides, treating the blanks in a bath containing starch, shaping them to cylindrical form and joining the edges, tapering the mouth of the cylinder, pressing and finally treating with vegetable oils, drying, polishing and varnishing.

The invention is hereinafter described with reference to the accompanyingdrawings in which: r

Figure 1 is a perspective view of the rectangular blank, Fig. 2 is a similar vlew showing the cylinder formed from the blank, Fig. 3 is a sectional side elevation of a machine through which the cylinder is drawn and submitted to heat, Fig. 4 is a section of the cylindershowing corrugated rolls acting thereon to impart the required taper to the mouth thereof, Fig. 5 is an end elevation of the rolls and cylinder shown in Fig. 4, Fig. 6 is a sectional elevation of a finishing press, and Figs. 7 and 8 illustrate in section and elevation the finished bush or case.

In carrying out the invention a board made of hemp fibers and absorbing material such as plaster, chalk talc and the like is cut into rectangular sheets a'dimensioned corresponding to the size of the bush required, Fig. 1, said rectangular sheets being then impregnated with a gelatinous preparation composed of water, starch, paraflin, turpentine and caustic potash. At the edges to be joined the sheets are then cut out or reduced in thickness as shown at Specification of Letters Patent.

Patented Oct. 10, 1916.

Application filed August 17, 1915. Serial No. 45,991.

b. and 0 and an adhesive applied thereto after which the sheet is shaped incylindrical form'with the said edges overlapping as shown in Fig. 2. In order to join the I overlapping edges and impart permanency to the shape, the cylinder is passed over'an iron core 1 Fig. 3, the adhesive substance on the edge I) is wetted and the other edge 0 is superposed on it by hand and th'ecylinder is guided on the core into a mufi' 2. A chain 3 connected to one end of said core, through a vise 4, draws said core and the cylinder through the m'ufi. The chain is guided on suitable r0lls 5 and driven by any suitable means. During this forming step, muff 2 is heated at'its entrance end,b means of. a ring of gas burners 6 connected to the gas pipe'7.

In order to give the cylinder or partly formed bush the required tapered shape at the mouth upon issuing from 'the mufi it is acted upon by two corrugated rolls 8 9 revolving in opposite direction, as shown in Figs. 4c'and 5. The bush or case is then transferred to the male former 10 Fig. 6 and the female former or die 13 slidably mounted on the vertical frame 11 12 is pressed over the bush by a screw 14. At the upper end of the former 13 there'is .fixed a circular knife 15 which cuts off the superfluous part of the bush.

The diameter D of the female former is greater than the diameter d of the male former by an amount (1 representing "the thickness of the bush. The bush is then taken off the former and a piece of paper 6 or the like is fixed at the interior of the tapered part, to reinforce same. The bush is thereupon dipped into a liquid preparation comprising vegetable oils and colophony where it is allowed to remain about five minutes, after which it is taken to a ventilated room where it is dried at the ordinary temperature for 24 hours. After this preliminary drying the bush is put into an oven heated to a temperature of 120 to 125 C. where it is left for six hours. It has now acquired the consistency and soundness of wood, and

is finally polished and varnished.

The mentioned process in so far as applicable is also used for preparing the coatings f of the nose and base shields g It that form va complete arrangement for explosives.

Claim A process for manufacturing a bush for explosives, consisting in first preparing a treating with vegetable oils, drying, polish- 10 board from hemp fiber and an absorbent ing and varnishing. I

material, cutting the board into an oblong In testimony whereof I aflix my signature rectangular blank with the fibers arranged in the presence of two Witnesses. in the direction of the longer sides, treating CELESTE BESOZZI the blank in a bath containing starch,.shaping the blank to cylindrical form, joining Witnesses: the edges of the cylinder, tapering the Grov. GIACOMO GUARNIERI,

' mouth of the cylinder, pressing and finally 4 LYLE ROBE. 

